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This is Scientific American Science.

Quickly, I'm Jeff Telvisio.

Quantum and Cryptography.

Those two words might strike fear in the minds of the uninitiated.

But in February's issue of Scientific American, we have a story about how they're colliding.

Here to walk us through is Kelsey Houston Edwards.

Kelsey is a mathematician and journalist. She formerly walk us through it is Kelsey Houston Edwards. Kelsey's a

mathematician and journalist. She formerly wrote and hosted the online show PBS Infinite series,

and she wrote this month's story called Tomorrow's Quantum Computers threatened today's secrets.

Here's how to protect them. Welcome to science quickly, Kelsey. Thank you. Thanks for having me.

Okay, let's jump right into this mathematical quantum tension.

How is quantum computing an issue for cryptography?

So cryptography is the art of sending messages in a way that someone in between cannot read them,

that only the sender and receiver can read them.

And there are essentially two different ways that this is done right now. And the first one is a sender and receiver have the same key, and they use that key to lock and unlock a box,

and the message is securely locked in the box in between.

...